Potassium Acetate → 4-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]5,6-dihydro-2H-pyridine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester

HRID 1629452Notes

Reaction equation

HRID 1629452 reaction equation
[CH:1]([N:4]1[C:8]([C:9]2[N:18]=[C:17]3[N:11]([CH2:12][CH2:13][O:14][C:15]4[CH:22]=[C:21](B5OC(C)(C)C(C)(C)O5)[CH:20]=[CH:19][C:16]=43)[CH:10]=2)=[N:7][CH:6]=[N:5]1)([CH3:3])[CH3:2].[CH3:32][O:33][C:34]([CH:36]1[CH:41](OS(C(F)(F)F)(=O)=O)[CH2:40][CH2:39][N:38]([C:50]([O:52][C:53]([CH3:56])([CH3:55])[CH3:54])=[O:51])[CH2:37]1)=[O:35].C([O-])(=O)C.[K+]>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].C(Cl)Cl.O>[CH3:32][O:33][C:34]([C:36]1[CH2:37][N:38]([C:50]([O:52][C:53]([CH3:56])([CH3:55])[CH3:54])=[O:51])[CH2:39][CH2:40][C:41]=1[C:21]1[CH:20]=[CH:19][C:16]2[C:17]3[N:11]([CH2:12][CH2:13][O:14][C:15]=2[CH:22]=1)[CH:10]=[C:9]([C:8]1[N:4]([CH:1]([CH3:3])[CH3:2])[N:5]=[CH:6][N:7]=1)[N:18]=3)=[O:35]

Participants

7

Reactant 3

HCID 517044Potassium AcetateHCID 582047132-(1-isopropyl-1H-1,2,4-triazol-5-yl)-9-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepineHCID 866523114-Trifluoromethanesulphonyloxy-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester

Product 1

HCID 582042864-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]5,6-dihydro-2H-pyridine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl esterYield 91.2%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolventHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
120 °C

Procedure

2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-8-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene (0.20 g, 0.49 mmol), 4-trifluoromethanesulphonyloxy-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester (0.29 g, 0.75 mmol), potassium acetate (0.12 g, 1.22 mmol), Pd(dppf)2Cl2.DCM (0.04 g, 0.05 mmol), DME:IMS:water 7:2:1 (5 mL), were sealed in a microwave vial and heated by microwave irradiation at 120° C. for 10 min. The reaction mixture was cooled to RT, water and DCM were added, the organic layer separated, washed with water, dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0 to 5% methanol in DCM) to give 4-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]5,6-dihydro-2H-pyridine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester (239 mg, 91%). 1H NMR 300 MHz (CDCl3) δ: 8.49 (1 H, d, J=8.30 Hz), 7.87 (1 H, d, J=0.64 Hz), 7.64 (1 H, s), 6.92 (1 H, dd, J=8.31, 1.80 Hz), 6.84 (1 H, d, J=1.77 Hz), 6.00 (1 H, m), 4.49-4.47 (4 H, m), 4.27 (2 H, s), 3.62 (2 H, t, J=5.69 Hz), 3.57 (2 H, s), 2.50 (3 H, s), 1.59 (6 H, d, J=6.63 Hz), 1.51 (9 H, s).

Workup

  1. temperatureThe reaction mixture was cooled to RT
  2. customthe organic layer separated
  3. washwashed with water
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-7081396bc2914e6a8f0801fa1a511ba1
Source dataset
uspto-grants-2014_07
Patent number
US08785626B2

Reaction notes

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